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Added way to use WebIdentity OIDC assume role #427

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Added way to use WebIdentity OIDC assume role #427

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70 changes: 70 additions & 0 deletions lib/Paws/Credential/AssumeRoleWithWebIdentity.pm
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Original file line number Diff line number Diff line change
@@ -0,0 +1,70 @@
package Paws::Credential::AssumeRoleWithWebIdentity;
use Moose;
use DateTime::Format::ISO8601;
use Paws::Credential::None;

with 'Paws::Credential';

has expiration => (
is => 'rw',
isa => 'Int',
lazy => 1,
default => sub { 0 }
);

has actual_creds => (is => 'rw', default => sub { {} });

sub access_key {
my $self = shift;
$self->_refresh;
$self->actual_creds->{AccessKeyId};
}

sub secret_key {
my $self = shift;
$self->_refresh;
$self->actual_creds->{SecretAccessKey};
}

sub session_token {
my $self = shift;
$self->_refresh;
$self->actual_creds->SessionToken;
}

has sts_region => (is => 'ro', isa => 'Str|Undef', default => sub { undef });

has sts => (is => 'ro', isa => 'Paws::STS', lazy => 1, default => sub {
my $self = shift;
Paws->service('STS', region => $self->sts_region, credentials => Paws::Credential::None->new);
});

has RoleArn => (is => 'rw', isa => 'Maybe[Str]', default => sub { $ENV{AWS_ROLE_ARN} });
has WebIdentityTokenFile => (is => 'rw', isa => 'Maybe[Str]', default => sub { $ENV{AWS_WEB_IDENTITY_TOKEN_FILE} });
has RoleSessionName => (is => 'rw', isa => 'Maybe[Str]', default => sub { $ENV{AWS_ROLE_SESSION_NAME} || 'aws-sdk-perl' });

sub _refresh {
my $self = shift;

return if $self->expiration >= time;
if( ! defined $self->WebIdentityTokenFile || ! defined $self->RoleArn){
return;
}
my $WebIdentityTokenFile = $self->WebIdentityTokenFile;
my $WebIdentityToken = do {
local $/;
open my $file_handle, "<", $WebIdentityTokenFile or die "Cannot open token file '$WebIdentityTokenFile' for reading: $!";
<$file_handle>;
};
my $RoleArn = $self->RoleArn;
my $RoleSessionName = $self->RoleSessionName;

my $result = $self->sts->AssumeRoleWithWebIdentity(
RoleSessionName => $self->RoleSessionName,
RoleArn => $self->RoleArn,
WebIdentityToken => $WebIdentityToken
);
my $creds = $self->actual_creds($result->Credentials);
$self->expiration(DateTime::Format::ISO8601->parse_datetime($result->Credentials->Expiration)->epoch);
}
1;
3 changes: 2 additions & 1 deletion lib/Paws/Credential/ProviderChain.pm
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Original file line number Diff line number Diff line change
Expand Up @@ -5,8 +5,9 @@ package Paws::Credential::ProviderChain;
is => 'ro',
isa => 'ArrayRef[Str]',
default => sub {
[ 'Paws::Credential::Environment',
[ 'Paws::Credential::Environment',
'Paws::Credential::File',
'Paws::Credential::AssumeRoleWithWebIdentity',
'Paws::Credential::ECSContainerProfile',
'Paws::Credential::InstanceProfile',
'Paws::Credential::InstanceProfileV2',
Expand Down